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habanalabs: define soft-reset as inference op 

Soft-reset is the procedure where we reset only the compute/DMA engines
of the device, without requiring the current user-space process to
release the device.

This type of reset can happen if TDR event occurred (a workload got
stuck) or by a root request through sysfs.

This is only relevant for inference ASICs, as there is no real-world
use-case to do that in training, because training runs on multiple
devices.

In addition, we also do (in certain ASICs) a reset upon device release.
That reset uses the same code as the soft-reset.

Therefore, to better differentiate between the two resets, it is better
to rename the soft-reset support as "inference soft-reset", to make
the code more self-explanatory.

Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This commit is contained in:
Oded Gabbay 2021-09-30 11:36:07 +03:00
parent dd08335fb9
commit a00f1f571e
4 changed files with 12 additions and 8 deletions
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2
drivers/misc/habanalabs/common/device.c
View File

@ -954,7 +954,7 @@ int hl_device_reset(struct hl_device *hdev, u32 flags)
goto do_reset;
}
if (!hard_reset && !hdev->allow_external_soft_reset) {
if (!hard_reset && !hdev->allow_inference_soft_reset) {
hard_instead_soft = true;
hard_reset = true;
}

10
drivers/misc/habanalabs/common/habanalabs.h
View File

@ -2440,8 +2440,12 @@ struct multi_cs_data {
* @collective_mon_idx: helper index for collective initialization
* @supports_coresight: is CoreSight supported.
* @supports_soft_reset: is soft reset supported.
* @allow_external_soft_reset: true if soft reset initiated by user or TDR is
* allowed.
* @allow_inference_soft_reset: true if the ASIC supports soft reset that is
* initiated by user or TDR. This is only true
* in inference ASICs, as there is no real-world
* use-case of doing soft-reset in training (due
* to the fact that training runs on multiple
* devices)
* @supports_cb_mapping: is mapping a CB to the device's MMU supported.
* @needs_reset: true if reset_on_lockup is false and device should be reset
* due to lockup.
@ -2572,7 +2576,7 @@ struct hl_device {
u8 collective_mon_idx;
u8 supports_coresight;
u8 supports_soft_reset;
u8 allow_external_soft_reset;
u8 allow_inference_soft_reset;
u8 supports_cb_mapping;
u8 needs_reset;
u8 process_kill_trial_cnt;

6
drivers/misc/habanalabs/common/sysfs.c
View File

@ -206,12 +206,12 @@ static ssize_t soft_reset_store(struct device *dev,
goto out;
}
if (!hdev->allow_external_soft_reset) {
dev_err(hdev->dev, "Device does not support soft-reset\n");
if (!hdev->allow_inference_soft_reset) {
dev_err(hdev->dev, "Device does not support inference soft-reset\n");
goto out;
}
dev_warn(hdev->dev, "Soft-Reset requested through sysfs\n");
dev_warn(hdev->dev, "Inference Soft-Reset requested through sysfs\n");
hl_device_reset(hdev, 0);

2
drivers/misc/habanalabs/goya/goya.c
View File

@ -959,7 +959,7 @@ static int goya_sw_init(struct hl_device *hdev)
spin_lock_init(&goya->hw_queues_lock);
hdev->supports_coresight = true;
hdev->supports_soft_reset = true;
hdev->allow_external_soft_reset = true;
hdev->allow_inference_soft_reset = true;
hdev->supports_wait_for_multi_cs = false;
hdev->asic_funcs->set_pci_memory_regions(hdev);